# #5 - EE200 DIGITAL LOGIC CIRCUIT DESIGN Class Notes CLASS...

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EE200(class 3-1) Prof. M.M. Dawoud 15 EE200 DIGITAL LOGIC CIRCUIT DESIGN Class Notes CLASS 3-1 The material covered in this class will be as follows: Binary codes, BCD code, BCD addition Other decimal codes Gray code Error-detecting code (parity bit) Alpha-numeric codes, ASCII code Binary codes: Digital systems and circuits work with signals that have only one of two states corresponding to digital 1 and 0. Any discrete element of information among a group of quantities (elements) can be represented by a binary code. One bit can represent up to two elements (1 or 0). A group of 2 n distinct elements requires a minimum of n bits. to code a group of m elements, we need to use n bits such that: 2 n m. Examples: o A group of four elements can be represented by two bit code [00, 01, 10, and 11]. o A binary code to represent the decimal digits [0-9], must contain at least four bits because (2 4 =16) 10 (2 3 =8).

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EE200(class 3-1) Prof. M.M. Dawoud 16 Decimal Codes: Decimal Digit BCD 8421
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## This note was uploaded on 05/21/2010 for the course EE EE200 taught by Professor Prof.ahmed during the Spring '09 term at King Fahd University of Petroleum & Minerals.

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#5 - EE200 DIGITAL LOGIC CIRCUIT DESIGN Class Notes CLASS...

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